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A233368 Number of (3+1)X(n+1) 0..1 arrays x(i,j) with row sums sum{j*x(i,j), j=1..n+1} nondecreasing, and column sums sum{i^2*x(i,j), i=1..3+1} nondecreasing 1
25, 139, 568, 1964, 6412, 19711, 56427, 150258, 375826, 893100, 2024828, 4391269, 9165068, 18490081, 36156100, 68675984, 126997620, 229017852, 403366974, 695484750, 1176286197, 1955039200, 3196887389, 5147543575, 8168623537 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 3 of A233366

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..31

EXAMPLE

Some solutions for n=5

..1..1..1..0..0..0....1..1..1..0..0..0....0..0..0..1..0..0....0..0..0..0..0..0

..1..1..0..1..1..1....0..0..0..0..0..1....1..0..0..0..1..1....0..1..1..0..0..0

..1..1..0..1..1..1....0..0..0..1..1..1....1..0..1..1..1..1....0..1..0..1..1..1

..0..0..1..1..1..1....1..1..1..1..1..1....0..1..1..1..1..1....0..0..1..1..1..1

CROSSREFS

Sequence in context: A147489 A156158 A195977 * A240415 A113524 A147505

Adjacent sequences:  A233365 A233366 A233367 * A233369 A233370 A233371

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 08 2013

STATUS

approved

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Last modified January 20 19:53 EST 2020. Contains 331096 sequences. (Running on oeis4.)